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4 May 2011, 10:26 | Updated: 4 May 2011, 12:18
London Underground workers are to take six days of strike action, in a growing row over the sacking of two Tube drivers, threatening travel chaos for millions of passengers.
The RMT union said its driver members on the Tube will walk out for between nine and 24 hours from Monday May 16th to Friday May 20th and again from Monday June 13th to Friday June 17th.
The union said 1,500 drivers - around half the total - will take strike action, threatening the worst disruption on the Tube since a series of strikes last autumn in a separate row over jobs.
London Underground say they'll work to keep London moving if the strikes go ahead.
The strikes will be held between 21.01 on Monday May 16 and 11.59 on Tuesday May 17, between 12.00 on Wednesday May 18 and 11.59 on Thursday May 19, and between 12.00 and 21.00 on Friday May 20.
Further walkouts will be held between 21.01 on Monday June 13 and 11.59 on Tuesday June 14, between 12.00 on Wednesday June 15 and 11.59 on Thursday June 16, and between 12.00 and 21.00 on Friday June 17.